Question

On a 3 section math test a student correctly answered 17/20 11/15 20/25 what percentage of questions on the entire test did the student answer correctly

Answer 1

79.44%

Explanation:

We are given that there are 3 sections to this test and how the student scored in each of those sections. Let us add all of these fractions together.

`(17)/(20) +(11)/(15) +(20)/(25) =(143)/(60) \\`

We must now divide this amount by 3 to find the average of the three sections. This gives us
`(143)/(180)`.

These means that the student answered
`(143)/(180)` of the questions correctly, or 79.44%.

Answer 2

Explanation:

17 of 20

11 of 15

20 of 25

that is in total

17+11+20 = 48

of

20+15+25 = 60

so, he answered 48 of 60 correctly

48/60 = 4/5 = 0.8 = 80%